DE502007006264D1 - DEVICE FOR NOISE REDUCTION ON AN AUDIO SIGNAL - Google Patents

DEVICE FOR NOISE REDUCTION ON AN AUDIO SIGNAL

Info

Publication number
DE502007006264D1
DE502007006264D1 DE502007006264T DE502007006264T DE502007006264D1 DE 502007006264 D1 DE502007006264 D1 DE 502007006264D1 DE 502007006264 T DE502007006264 T DE 502007006264T DE 502007006264 T DE502007006264 T DE 502007006264T DE 502007006264 D1 DE502007006264 D1 DE 502007006264D1
Authority
DE
Germany
Prior art keywords
signals
noise
error filter
error
basis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
DE502007006264T
Other languages
German (de)
Inventor
Erhard Rank
Gernot Kubin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Technische Universitaet Graz
Forschungsholding TU Graz GmbH
Original Assignee
Technische Universitaet Graz
Forschungsholding TU Graz GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Technische Universitaet Graz, Forschungsholding TU Graz GmbH filed Critical Technische Universitaet Graz
Publication of DE502007006264D1 publication Critical patent/DE502007006264D1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208—Noise filtering
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/03—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters
    • G10L25/12—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters the extracted parameters being prediction coefficients

Landscapes

  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Computational Linguistics (AREA)
  • Physics & Mathematics (AREA)
  • Quality & Reliability (AREA)
  • Multimedia (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Noise Elimination (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)

Abstract

An apparatus for noise suppression having a linear prediction analysis circuit having an LP error filter (LFF), which takes a first, noisy voice signal y(n)=x(n)+ε(n) as a basis for producing an LP-error-filter output signal e(n), having a coefficient calculation unit (KBE), which updates the coefficients of the LP error filter on the basis of the internal signals (including the input and out signals y(n) and e(n)) in the LP error filter, and having a subtraction unit, which subtracts the LP error filter output signal e(n) from the first voice signal y(n) in a subtractor and, following the subtraction, outputs the remainder as a second voice signal x(n)=y(n)−e(n) in which the noise is suppressed. A noise estimation unit (GSE) is provided which takes the internal signals of the LP error filter as a basis for producing a noise power signal σn2 and a voice power signal σx2, these signals are applied to the coefficient calculation unit (KBE) and said signals are used by the latter for the purpose of optimizing the noise suppression.
DE502007006264T 2006-09-15 2007-09-06 DEVICE FOR NOISE REDUCTION ON AN AUDIO SIGNAL Active DE502007006264D1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0154706A AT504164B1 (en) 2006-09-15 2006-09-15 DEVICE FOR NOISE PRESSURE ON AN AUDIO SIGNAL
PCT/AT2007/000424 WO2008031124A1 (en) 2006-09-15 2007-09-06 Apparatus for noise suppression in an audio signal

Publications (1)

Publication Number Publication Date
DE502007006264D1 true DE502007006264D1 (en) 2011-02-24

Family

ID=38626580

Family Applications (1)

Application Number Title Priority Date Filing Date
DE502007006264T Active DE502007006264D1 (en) 2006-09-15 2007-09-06 DEVICE FOR NOISE REDUCTION ON AN AUDIO SIGNAL

Country Status (5)

Country Link
US (1) US20100049507A1 (en)
EP (1) EP2080197B1 (en)
AT (2) AT504164B1 (en)
DE (1) DE502007006264D1 (en)
WO (1) WO2008031124A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2363853A1 (en) * 2010-03-04 2011-09-07 Österreichische Akademie der Wissenschaften A method for estimating the clean spectrum of a signal
US20150081495A1 (en) * 2013-09-19 2015-03-19 Barclays Bank Plc System and Method for Account Succession
US10251002B2 (en) 2016-03-21 2019-04-02 Starkey Laboratories, Inc. Noise characterization and attenuation using linear predictive coding
CN110047529B (en) * 2019-05-15 2024-02-20 中国人民解放军海军潜艇学院 Signal adaptive amplification multipath audio recording device and method
CN117350099B (en) * 2023-09-11 2024-04-16 北京五瑞美阳医疗器械有限责任公司 Finite element analysis-based respirator noise reduction structure optimization method
CN117037837B (en) * 2023-10-09 2023-12-12 广州伏羲智能科技有限公司 Noise separation method and device based on audio track separation technology

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1520148A (en) 1975-10-09 1978-08-02 Standard Telephones Cables Ltd Adaptive lattice filter
US4587620A (en) 1981-05-09 1986-05-06 Nippon Gakki Seizo Kabushiki Kaisha Noise elimination device
US4720802A (en) * 1983-07-26 1988-01-19 Lear Siegler Noise compensation arrangement
US5913187A (en) * 1997-08-29 1999-06-15 Nortel Networks Corporation Nonlinear filter for noise suppression in linear prediction speech processing devices
JP2001175298A (en) * 1999-12-13 2001-06-29 Fujitsu Ltd Noise suppression device
US6925435B1 (en) * 2000-11-27 2005-08-02 Mindspeed Technologies, Inc. Method and apparatus for improved noise reduction in a speech encoder
US7065486B1 (en) * 2002-04-11 2006-06-20 Mindspeed Technologies, Inc. Linear prediction based noise suppression
US6892127B2 (en) 2003-02-28 2005-05-10 General Electric Company Methods and apparatus for assessing gas turbine engine damage
EP1580882B1 (en) * 2004-03-19 2007-01-10 Harman Becker Automotive Systems GmbH Audio enhancement system and method
US7716046B2 (en) * 2004-10-26 2010-05-11 Qnx Software Systems (Wavemakers), Inc. Advanced periodic signal enhancement
EP2054882B1 (en) * 2006-08-15 2011-01-19 Dolby Laboratories Licensing Corporation Arbitrary shaping of temporal noise envelope without side-information

Also Published As

Publication number Publication date
EP2080197A1 (en) 2009-07-22
AT504164B1 (en) 2009-04-15
ATE495523T1 (en) 2011-01-15
EP2080197B1 (en) 2011-01-12
AT504164A1 (en) 2008-03-15
WO2008031124A1 (en) 2008-03-20
US20100049507A1 (en) 2010-02-25

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